Agilent HPMX-7123
Single-Band Downconverter
Optimized for 1900 MHz PCS Applications
Data Sheet
Features
• Wide band operation
RF input: 0.4 – 2.4 GHz
IF output: 50 – 400 MHz
• High conversion gain (14 dB)
• 2.7 – 5.0 V operation
General Description
The HPMX-7123 downconverter,
part of the
CDMAdvantage
RF
chipset, offers a highly integrated
solution for PCS handsets. This
integrated solution leads to
improvement in cost and reliabil-
ity. The HPMX-7123 has a high IP3
which is highly desirable for
CDMA high dynamic range
receivers with good noise and
spurious suppression.
The chip is comprised of an RF
input LNA followed by a wideband
mixer. The output of the
downconverter is differential
providing common mode rejec-
tion. The outputs are high imped-
ance open collectors.
HPMX-7123 features a current
control through a DC voltage, Vcs,
to accommodate varying linearity
requirements. If used dynamically,
current control reduces the
overall current consumption
maximizing battery life. In addi-
tion input linearity can be in-
creased by adding inductance to
the combined pin 2 and pin 3.
The IC is housed in a miniature
BCC-16 package and manufac-
tured on high frequency, low noise
Si-Bipolar process (25 GHz Ft).
• Low & adjustable current: 6 – 18 mA
• Differential IF outputs
• Adjustable IP3 (20 dBm OIP3)
• Standard BCC-16 surface mount
package
Applications
• PCS handsets
• Wireless data terminals
• Wireless LAN (802.11)
Plastic Package, BCC-16
Functional Block Diagram
Vcs
Current
Control
& Bias
RFin
IF
IF
HPMX-7
123
LO LO
For optimal performance, differential LO drive
is recommended.
HPMX-7123 Absolute Maximum Ratings
[1]
Parameter
Vcc Supply Voltage
Control Voltage
Input RF Power
LO Input Power
Case Temperature
Storage Temperature
Units
Volt
Volt
dBm
dBm
°C
°C
Absolute Maximum
5
Vcc + 0.5
5
7
125
150
Note:
1. Operation of this device in excess of any of
these limits may cause permanent damage.
Recommended operating range of Vcc = 2.7 to 3.6 V, T
a
= -40 to +85°C.
HPMX-7123 Standard Test Conditions
Unless otherwise stated, all test data was taken on packaged parts under the following conditions:
Vcc = +3.0 V, T
ambient
= 25°C, Vcs = 3 V (Icc = 17 mA)
LO input: 1750 MHz, -3 dBm, single-ended
RF input: 1960 MHz, -33 dBm, single-ended
Z
inmixer
= 50Ω, Z
out
= 500Ω differential (See Figure 4 for test set-up schematic diagram)
HPMX-7123 Summary Characterization Information
Standard test conditions apply unless otherwise noted.
PCS
Symbol
Icc
Parameters and Test Conditions
Supply Current
Vcs
3V
2.5 V
1.5 V
3V
1.5 V
3V
1.5 V
3V
1.5 V
3V
1.5 V
Min.
Typ.
17
14
8
Max.
Units
mA
Gc
NF (SSB)
IIP3
OIP3
RL (RF)
RL (IF)
RL (LO)
Notes:
1. Externally matched
2. LO-Balun 4:1
Conversion Gain
Noise Figure
Input Third Order Intercept
Output Third Order Intercept
RF port Return Loss
[1]
IF port Return Loss
[1]
LO port Return Loss
[2]
12.5
14
12
10
7
6
1
20
13
>10
>10
>10
11.5
dB
dB
dBm
dBm
dB
dB
dB
2
HPMX-7123 Characterization Graphs
Measurements taken at the following conditions, unless noted otherwise: Vcc = 3V, Vcs = 3V, LO frequency = 1750 MHz (-3 dB), 25°C
16
10
15
15
5
10
GAIN (dB)
IIP3 (dB)
0
13
5
-5
12
Vcs = 3 V
Vcs = 2.5 V
Vcs = 1.5 V
Vcs = 3 V
Vcs = 2.5 V
Vcs = 1.5 V
Vcs = 3 V
Vcs = 2.5 V
Vcs = 1.5 V
NF (dB)
-9
-6
-3
0
3
0
-12
14
11
-12
-9
-6
-3
0
3
-10
-12
-9
-6
-3
0
3
LO POWER (dBm)
LO Power (dBm)
LO Power (dBm)
Figure 1. Gain vs. LO Power.
Figure 2. IIP3 vs. LO Power.
Figure 3. NF vs. LO Power .
4
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